Merge new fixes and features from acq4

GraphicsScene/exportDialog.py

@@ -27,6 +27,7 @@ class ExportDialog(QtGui.QWidget):
         
         self.ui.closeBtn.clicked.connect(self.close)
         self.ui.exportBtn.clicked.connect(self.exportClicked)
+        self.ui.copyBtn.clicked.connect(self.copyClicked)
         self.ui.itemTree.currentItemChanged.connect(self.exportItemChanged)
         self.ui.formatList.currentItemChanged.connect(self.exportFormatChanged)
         
@@ -116,11 +117,16 @@ class ExportDialog(QtGui.QWidget):
         else:
             self.ui.paramTree.setParameters(params)
         self.currentExporter = exp
+        self.ui.copyBtn.setEnabled(exp.allowCopy)
         
     def exportClicked(self):
         self.selectBox.hide()
         self.currentExporter.export()
         
+    def copyClicked(self):
+        self.selectBox.hide()
+        self.currentExporter.export(copy=True)
+        
     def close(self):
         self.selectBox.setVisible(False)
         self.setVisible(False)

GraphicsScene/exportDialogTemplate.ui

@@ -79,6 +79,13 @@
      </property>
     </widget>
    </item>
+   <item row="6" column="0">
+    <widget class="QPushButton" name="copyBtn">
+     <property name="text">
+      <string>Copy</string>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <customwidgets>

GraphicsScene/exportDialogTemplate_pyqt.py

@@ -2,8 +2,8 @@
 
 # Form implementation generated from reading ui file './GraphicsScene/exportDialogTemplate.ui'
 #
-# Created: Sun Sep  9 14:41:31 2012
+# Created: Wed Jan 30 21:02:28 2013
-#      by: PyQt4 UI code generator 4.9.1
+#      by: PyQt4 UI code generator 4.9.3
 #
 # WARNING! All changes made in this file will be lost!
 
@@ -49,6 +49,9 @@ class Ui_Form(object):
         self.label_3 = QtGui.QLabel(Form)
         self.label_3.setObjectName(_fromUtf8("label_3"))
         self.gridLayout.addWidget(self.label_3, 4, 0, 1, 3)
+        self.copyBtn = QtGui.QPushButton(Form)
+        self.copyBtn.setObjectName(_fromUtf8("copyBtn"))
+        self.gridLayout.addWidget(self.copyBtn, 6, 0, 1, 1)
 
         self.retranslateUi(Form)
         QtCore.QMetaObject.connectSlotsByName(Form)
@@ -60,5 +63,6 @@ class Ui_Form(object):
         self.exportBtn.setText(QtGui.QApplication.translate("Form", "Export", None, QtGui.QApplication.UnicodeUTF8))
         self.closeBtn.setText(QtGui.QApplication.translate("Form", "Close", None, QtGui.QApplication.UnicodeUTF8))
         self.label_3.setText(QtGui.QApplication.translate("Form", "Export options", None, QtGui.QApplication.UnicodeUTF8))
+        self.copyBtn.setText(QtGui.QApplication.translate("Form", "Copy", None, QtGui.QApplication.UnicodeUTF8))
 
 from pyqtgraph.parametertree import ParameterTree

GraphicsScene/exportDialogTemplate_pyside.py

@@ -2,8 +2,8 @@
 
 # Form implementation generated from reading ui file './GraphicsScene/exportDialogTemplate.ui'
 #
-# Created: Sun Sep  9 14:41:31 2012
+# Created: Wed Jan 30 21:02:28 2013
-#      by: pyside-uic 0.2.13 running on PySide 1.1.0
+#      by: pyside-uic 0.2.13 running on PySide 1.1.1
 #
 # WARNING! All changes made in this file will be lost!
 
@@ -44,6 +44,9 @@ class Ui_Form(object):
         self.label_3 = QtGui.QLabel(Form)
         self.label_3.setObjectName("label_3")
         self.gridLayout.addWidget(self.label_3, 4, 0, 1, 3)
+        self.copyBtn = QtGui.QPushButton(Form)
+        self.copyBtn.setObjectName("copyBtn")
+        self.gridLayout.addWidget(self.copyBtn, 6, 0, 1, 1)
 
         self.retranslateUi(Form)
         QtCore.QMetaObject.connectSlotsByName(Form)
@@ -55,5 +58,6 @@ class Ui_Form(object):
         self.exportBtn.setText(QtGui.QApplication.translate("Form", "Export", None, QtGui.QApplication.UnicodeUTF8))
         self.closeBtn.setText(QtGui.QApplication.translate("Form", "Close", None, QtGui.QApplication.UnicodeUTF8))
         self.label_3.setText(QtGui.QApplication.translate("Form", "Export options", None, QtGui.QApplication.UnicodeUTF8))
+        self.copyBtn.setText(QtGui.QApplication.translate("Form", "Copy", None, QtGui.QApplication.UnicodeUTF8))
 
 from pyqtgraph.parametertree import ParameterTree

PlotData.py

@@ -0,0 +1,55 @@
+
+
+class PlotData(object):
+    """
+    Class used for managing plot data
+      - allows data sharing between multiple graphics items (curve, scatter, graph..)
+      - each item may define the columns it needs
+      - column groupings ('pos' or x, y, z)
+      - efficiently appendable 
+      - log, fft transformations
+      - color mode conversion (float/byte/qcolor)
+      - pen/brush conversion
+      - per-field cached masking
+        - allows multiple masking fields (different graphics need to mask on different criteria) 
+        - removal of nan/inf values
+      - option for single value shared by entire column
+      - cached downsampling
+    """
+    def __init__(self):
+        self.fields = {}
+        
+        self.maxVals = {}  ## cache for max/min
+        self.minVals = {}
+
+    def addFields(self, fields):
+        for f in fields:
+            if f not in self.fields:
+                self.fields[f] = None
+
+    def hasField(self, f):
+        return f in self.fields
+
+    def __getitem__(self, field):
+        return self.fields[field]
+    
+    def __setitem__(self, field, val):
+        self.fields[field] = val
+    
+    def max(self, field):
+        mx = self.maxVals.get(field, None)
+        if mx is None:
+            mx = np.max(self[field])
+            self.maxVals[field] = mx
+        return mx
+    
+    def min(self, field):
+        mn = self.minVals.get(field, None)
+        if mn is None:
+            mn = np.min(self[field])
+            self.minVals[field] = mn
+        return mn
+    
+    
+    
+    

colormap.py

@@ -0,0 +1,262 @@
+import numpy as np
+import scipy.interpolate
+from pyqtgraph.Qt import QtGui, QtCore
+
+class ColorMap(object):
+    
+    ## color interpolation modes
+    RGB = 1
+    HSV_POS = 2
+    HSV_NEG = 3
+    
+    ## boundary modes
+    CLIP = 1
+    REPEAT = 2
+    MIRROR = 3
+    
+    ## return types
+    BYTE = 1
+    FLOAT = 2
+    QCOLOR = 3
+    
+    enumMap = {
+        'rgb': RGB,
+        'hsv+': HSV_POS,
+        'hsv-': HSV_NEG,
+        'clip': CLIP,
+        'repeat': REPEAT,
+        'mirror': MIRROR,
+        'byte': BYTE,
+        'float': FLOAT,
+        'qcolor': QCOLOR,
+    }
+    
+    def __init__(self, pos, color, mode=None):
+        """
+        ========= ==============================================================
+        Arguments
+        pos       Array of positions where each color is defined
+        color     Array of RGBA colors.
+                  Integer data types are interpreted as 0-255; float data types
+                  are interpreted as 0.0-1.0
+        mode      Array of color modes (ColorMap.RGB, HSV_POS, or HSV_NEG) 
+                  indicating the color space that should be used when 
+                  interpolating between stops. Note that the last mode value is
+                  ignored. By default, the mode is entirely RGB.
+        ========= ==============================================================
+        """
+        self.pos = pos
+        self.color = color
+        if mode is None:
+            mode = np.ones(len(pos))
+        self.mode = mode
+        self.stopsCache = {}
+        
+    def map(self, data, mode='byte'):
+        """
+        Data must be either a scalar position or an array (any shape) of positions.
+        """
+        if isinstance(mode, basestring):
+            mode = self.enumMap[mode.lower()]
+            
+        if mode == self.QCOLOR:
+            pos, color = self.getStops(self.BYTE)
+        else:
+            pos, color = self.getStops(mode)
+            
+        data = np.clip(data, pos.min(), pos.max())
+            
+        if not isinstance(data, np.ndarray):
+            interp = scipy.interpolate.griddata(pos, color, np.array([data]))[0]
+        else:
+            interp = scipy.interpolate.griddata(pos, color, data)
+        
+        if mode == self.QCOLOR:
+            if not isinstance(data, np.ndarray):
+                return QtGui.QColor(*interp)
+            else:
+                return [QtGui.QColor(*x) for x in interp]
+        else:
+            return interp
+        
+    def mapToQColor(self, data):
+        return self.map(data, mode=self.QCOLOR)
+
+    def mapToByte(self, data):
+        return self.map(data, mode=self.BYTE)
+
+    def mapToFloat(self, data):
+        return self.map(data, mode=self.FLOAT)
+    
+    def getGradient(self, p1=None, p2=None):
+        """Return a QLinearGradient object."""
+        if p1 == None:
+            p1 = QtCore.QPointF(0,0)
+        if p2 == None:
+            p2 = QtCore.QPointF(self.pos.max()-self.pos.min(),0)
+        g = QtGui.QLinearGradient(p1, p2)
+        
+        pos, color = self.getStops(mode=self.BYTE)
+        color = [QtGui.QColor(*x) for x in color]
+        g.setStops(zip(pos, color))
+        
+        #if self.colorMode == 'rgb':
+            #ticks = self.listTicks()
+            #g.setStops([(x, QtGui.QColor(t.color)) for t,x in ticks])
+        #elif self.colorMode == 'hsv':  ## HSV mode is approximated for display by interpolating 10 points between each stop
+            #ticks = self.listTicks()
+            #stops = []
+            #stops.append((ticks[0][1], ticks[0][0].color))
+            #for i in range(1,len(ticks)):
+                #x1 = ticks[i-1][1]
+                #x2 = ticks[i][1]
+                #dx = (x2-x1) / 10.
+                #for j in range(1,10):
+                    #x = x1 + dx*j
+                    #stops.append((x, self.getColor(x)))
+                #stops.append((x2, self.getColor(x2)))
+            #g.setStops(stops)
+        return g
+    
+    def getColors(self, mode=None):
+        """Return list of all colors converted to the specified mode.
+        If mode is None, then no conversion is done."""
+        if isinstance(mode, basestring):
+            mode = self.enumMap[mode.lower()]
+        
+        color = self.color
+        if mode in [self.BYTE, self.QCOLOR] and color.dtype.kind == 'f':
+            color = (color * 255).astype(np.ubyte)
+        elif mode == self.FLOAT and color.dtype.kind != 'f':
+            color = color.astype(float) / 255.
+            
+        if mode == self.QCOLOR:
+            color = [QtGui.QColor(*x) for x in color]
+            
+        return color
+        
+    def getStops(self, mode):
+        ## Get fully-expanded set of RGBA stops in either float or byte mode.
+        if mode not in self.stopsCache:
+            color = self.color
+            if mode == self.BYTE and color.dtype.kind == 'f':
+                color = (color * 255).astype(np.ubyte)
+            elif mode == self.FLOAT and color.dtype.kind != 'f':
+                color = color.astype(float) / 255.
+        
+            ## to support HSV mode, we need to do a little more work..
+            #stops = []
+            #for i in range(len(self.pos)):
+                #pos = self.pos[i]
+                #color = color[i]
+                
+                #imode = self.mode[i]
+                #if imode == self.RGB:
+                    #stops.append((x,color)) 
+                #else:
+                    #ns = 
+            self.stopsCache[mode] = (self.pos, color)
+        return self.stopsCache[mode]
+        
+    #def getColor(self, x, toQColor=True):
+        #"""
+        #Return a color for a given value.
+        
+        #============= ==================================================================
+        #**Arguments** 
+        #x             Value (position on gradient) of requested color.
+        #toQColor      If true, returns a QColor object, else returns a (r,g,b,a) tuple.
+        #============= ==================================================================
+        #"""
+        #ticks = self.listTicks()
+        #if x <= ticks[0][1]:
+            #c = ticks[0][0].color
+            #if toQColor:
+                #return QtGui.QColor(c)  # always copy colors before handing them out
+            #else:
+                #return (c.red(), c.green(), c.blue(), c.alpha())
+        #if x >= ticks[-1][1]:
+            #c = ticks[-1][0].color
+            #if toQColor:
+                #return QtGui.QColor(c)  # always copy colors before handing them out
+            #else:
+                #return (c.red(), c.green(), c.blue(), c.alpha())
+            
+        #x2 = ticks[0][1]
+        #for i in range(1,len(ticks)):
+            #x1 = x2
+            #x2 = ticks[i][1]
+            #if x1 <= x and x2 >= x:
+                #break
+                
+        #dx = (x2-x1)
+        #if dx == 0:
+            #f = 0.
+        #else:
+            #f = (x-x1) / dx
+        #c1 = ticks[i-1][0].color
+        #c2 = ticks[i][0].color
+        #if self.colorMode == 'rgb':
+            #r = c1.red() * (1.-f) + c2.red() * f
+            #g = c1.green() * (1.-f) + c2.green() * f
+            #b = c1.blue() * (1.-f) + c2.blue() * f
+            #a = c1.alpha() * (1.-f) + c2.alpha() * f
+            #if toQColor:
+                #return QtGui.QColor(int(r), int(g), int(b), int(a))
+            #else:
+                #return (r,g,b,a)
+        #elif self.colorMode == 'hsv':
+            #h1,s1,v1,_ = c1.getHsv()
+            #h2,s2,v2,_ = c2.getHsv()
+            #h = h1 * (1.-f) + h2 * f
+            #s = s1 * (1.-f) + s2 * f
+            #v = v1 * (1.-f) + v2 * f
+            #c = QtGui.QColor()
+            #c.setHsv(h,s,v)
+            #if toQColor:
+                #return c
+            #else:
+                #return (c.red(), c.green(), c.blue(), c.alpha())
+                    
+    def getLookupTable(self, start=0.0, stop=1.0, nPts=512, alpha=None, mode='byte'):
+        """
+        Return an RGB(A) lookup table (ndarray). 
+        
+        ============= ============================================================================
+        **Arguments**
+        nPts           The number of points in the returned lookup table.
+        alpha          True, False, or None - Specifies whether or not alpha values are included 
+                       in the table. If alpha is None, it will be automatically determined.
+        ============= ============================================================================
+        """
+        if isinstance(mode, basestring):
+            mode = self.enumMap[mode.lower()]
+        
+        if alpha is None:
+            alpha = self.usesAlpha()
+            
+        x = np.linspace(start, stop, nPts)
+        table = self.map(x, mode)
+        
+        if not alpha:
+            return table[:,:3]
+        else:
+            return table
+    
+    def usesAlpha(self):
+        """Return True if any stops have an alpha < 255"""
+        max = 1.0 if self.color.dtype.kind == 'f' else 255
+        return np.any(self.color[:,3] != max)
+            
+    def isMapTrivial(self):
+        """Return True if the gradient has exactly two stops in it: black at 0.0 and white at 1.0"""
+        if len(self.pos) != 2:
+            return False
+        if self.pos[0] != 0.0 or self.pos[1] != 1.0:
+            return False
+        if self.color.dtype.kind == 'f':
+            return np.all(self.color == np.array([[0.,0.,0.,1.], [1.,1.,1.,1.]]))
+        else:
+            return np.all(self.color == np.array([[0,0,0,255], [255,255,255,255]]))
+
+

debug.py

@@ -917,3 +917,21 @@ def qObjectReport(verbose=False):
     for t in typs:
         print(count[t], "\t", t)
         
+
+class PrintDetector(object):
+    def __init__(self):
+        self.stdout = sys.stdout
+        sys.stdout = self
+    
+    def remove(self):
+        sys.stdout = self.stdout
+        
+    def __del__(self):
+        self.remove()
+    
+    def write(self, x):
+        self.stdout.write(x)
+        traceback.print_stack()
+        
+    def flush(self):
+        self.stdout.flush()

exporters/Exporter.py

@@ -9,7 +9,8 @@ class Exporter(object):
     """
     Abstract class used for exporting graphics to file / printer / whatever.
     """    
-
+    allowCopy = False  # subclasses set this to True if they can use the copy buffer
+    
     def __init__(self, item):
         """
         Initialize with the item to be exported.
@@ -25,10 +26,11 @@ class Exporter(object):
         """Return the parameters used to configure this exporter."""
         raise Exception("Abstract method must be overridden in subclass.")
         
-    def export(self, fileName=None, toBytes=False):
+    def export(self, fileName=None, toBytes=False, copy=False):
         """
         If *fileName* is None, pop-up a file dialog.
-        If *toString* is True, return a bytes object rather than writing to file.
+        If *toBytes* is True, return a bytes object rather than writing to file.
+        If *copy* is True, export to the copy buffer rather than writing to file.
         """
         raise Exception("Abstract method must be overridden in subclass.")
 

exporters/ImageExporter.py

@@ -8,6 +8,8 @@ __all__ = ['ImageExporter']
 
 class ImageExporter(Exporter):
     Name = "Image File (PNG, TIF, JPG, ...)"
+    allowCopy = True
+    
     def __init__(self, item):
         Exporter.__init__(self, item)
         tr = self.getTargetRect()
@@ -38,8 +40,8 @@ class ImageExporter(Exporter):
     def parameters(self):
         return self.params
     
-    def export(self, fileName=None):
+    def export(self, fileName=None, toBytes=False, copy=False):
-        if fileName is None:
+        if fileName is None and not toBytes and not copy:
             filter = ["*."+str(f) for f in QtGui.QImageWriter.supportedImageFormats()]
             preferred = ['*.png', '*.tif', '*.jpg']
             for p in preferred[::-1]:
@@ -78,6 +80,12 @@ class ImageExporter(Exporter):
         finally:
             self.setExportMode(False)
         painter.end()
-        self.png.save(fileName)
+        
+        if copy:
+            QtGui.QApplication.clipboard().setImage(self.png)
+        elif toBytes:
+            return self.png
+        else:
+            self.png.save(fileName)
         
         

exporters/SVGExporter.py

@@ -11,6 +11,8 @@ __all__ = ['SVGExporter']
 
 class SVGExporter(Exporter):
     Name = "Scalable Vector Graphics (SVG)"
+    allowCopy=True
+    
     def __init__(self, item):
         Exporter.__init__(self, item)
         #tr = self.getTargetRect()
@@ -37,8 +39,8 @@ class SVGExporter(Exporter):
     def parameters(self):
         return self.params
     
-    def export(self, fileName=None, toBytes=False):
+    def export(self, fileName=None, toBytes=False, copy=False):
-        if toBytes is False and fileName is None:
+        if toBytes is False and copy is False and fileName is None:
             self.fileSaveDialog(filter="Scalable Vector Graphics (*.svg)")
             return
         #self.svg = QtSvg.QSvgGenerator()
@@ -83,11 +85,16 @@ class SVGExporter(Exporter):
         xml = generateSvg(self.item)
         
         if toBytes:
-            return bytes(xml)
+            return xml.encode('UTF-8')
+        elif copy:
+            md = QtCore.QMimeData()
+            md.setData('image/svg+xml', QtCore.QByteArray(xml.encode('UTF-8')))
+            QtGui.QApplication.clipboard().setMimeData(md)
         else:
             with open(fileName, 'w') as fh:
                 fh.write(xml.encode('UTF-8'))
 
+
 xmlHeader = """\
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"  version="1.2" baseProfile="tiny">
@@ -148,7 +155,7 @@ def _generateItemSvg(item, nodes=None, root=None):
     ##    
     ##    Both 2 and 3 can be addressed by drawing all items in world coordinates.
     
-    
+    prof = pg.debug.Profiler('generateItemSvg %s' % str(item), disabled=True)
     
     if nodes is None:  ## nodes maps all node IDs to their XML element. 
                        ## this allows us to ensure all elements receive unique names.
@@ -170,8 +177,12 @@ def _generateItemSvg(item, nodes=None, root=None):
     tr = QtGui.QTransform()
     if isinstance(item, QtGui.QGraphicsScene):
         xmlStr = "<g>\n</g>\n"
-        childs = [i for i in item.items() if i.parentItem() is None]
         doc = xml.parseString(xmlStr)
+        childs = [i for i in item.items() if i.parentItem() is None]
+    elif item.__class__.paint == QtGui.QGraphicsItem.paint:
+        xmlStr = "<g>\n</g>\n"
+        doc = xml.parseString(xmlStr)
+        childs = item.childItems()
     else:
         childs = item.childItems()
         tr = itemTransform(item, item.scene())
@@ -223,11 +234,12 @@ def _generateItemSvg(item, nodes=None, root=None):
         print(doc.toxml())
         raise
 
+    prof.mark('render')
 
     ## Get rid of group transformation matrices by applying
     ## transformation to inner coordinates
     correctCoordinates(g1, item)
-    
+    prof.mark('correct')
     ## make sure g1 has the transformation matrix
     #m = (tr.m11(), tr.m12(), tr.m21(), tr.m22(), tr.m31(), tr.m32())
     #g1.setAttribute('transform', "matrix(%f,%f,%f,%f,%f,%f)" % m)
@@ -277,6 +289,8 @@ def _generateItemSvg(item, nodes=None, root=None):
             childGroup = g1.ownerDocument.createElement('g')
             childGroup.setAttribute('clip-path', 'url(#%s)' % clip)
             g1.appendChild(childGroup)
+    prof.mark('clipping')
+            
     ## Add all child items as sub-elements.
     childs.sort(key=lambda c: c.zValue())
     for ch in childs:
@@ -284,7 +298,8 @@ def _generateItemSvg(item, nodes=None, root=None):
         if cg is None:
             continue
         childGroup.appendChild(cg)  ### this isn't quite right--some items draw below their parent (good enough for now)
-    
+    prof.mark('children')
+    prof.finish()
     return g1
 
 def correctCoordinates(node, item):

graphicsItems/AxisItem.py

@@ -683,7 +683,7 @@ class AxisItem(GraphicsWidget):
                 if tickPositions[i][j] is None:
                     strings[j] = None
 
-            textRects.extend([p.boundingRect(QtCore.QRectF(0, 0, 100, 100), QtCore.Qt.AlignCenter, s) for s in strings if s is not None])
+            textRects.extend([p.boundingRect(QtCore.QRectF(0, 0, 100, 100), QtCore.Qt.AlignCenter, str(s)) for s in strings if s is not None])
             if i > 0:  ## always draw top level
                 ## measure all text, make sure there's enough room
                 if axis == 0:
@@ -699,8 +699,9 @@ class AxisItem(GraphicsWidget):
             #strings = self.tickStrings(values, self.scale, spacing)
             for j in range(len(strings)):
                 vstr = strings[j]
-                if vstr is None:## this tick was ignored because it is out of bounds
+                if vstr is None: ## this tick was ignored because it is out of bounds
                     continue
+                vstr = str(vstr)
                 x = tickPositions[i][j]
                 textRect = p.boundingRect(QtCore.QRectF(0, 0, 100, 100), QtCore.Qt.AlignCenter, vstr)
                 height = textRect.height()

graphicsItems/GradientEditorItem.py

@@ -5,6 +5,8 @@ from .GraphicsObject import GraphicsObject
 from .GraphicsWidget import GraphicsWidget
 import weakref
 from pyqtgraph.pgcollections import OrderedDict
+from pyqtgraph.colormap import ColorMap
+
 import numpy as np
 
 __all__ = ['TickSliderItem', 'GradientEditorItem']
@@ -22,6 +24,9 @@ Gradients = OrderedDict([
 ])
 
 
+
+
+
 class TickSliderItem(GraphicsWidget):
     ## public class
     """**Bases:** :class:`GraphicsWidget <pyqtgraph.GraphicsWidget>`
@@ -490,6 +495,18 @@ class GradientEditorItem(TickSliderItem):
         self.colorMode = cm
         self.updateGradient()
         
+    def colorMap(self):
+        """Return a ColorMap object representing the current state of the editor."""
+        if self.colorMode == 'hsv':
+            raise NotImplementedError('hsv colormaps not yet supported')
+        pos = []
+        color = []
+        for t,x in self.listTicks():
+            pos.append(x)
+            c = t.color
+            color.append([c.red(), c.green(), c.blue(), c.alpha()])
+        return ColorMap(np.array(pos), np.array(color, dtype=np.ubyte))
+        
     def updateGradient(self):
         #private
         self.gradient = self.getGradient()
@@ -611,7 +628,7 @@ class GradientEditorItem(TickSliderItem):
             b = c1.blue() * (1.-f) + c2.blue() * f
             a = c1.alpha() * (1.-f) + c2.alpha() * f
             if toQColor:
-                return QtGui.QColor(r, g, b,a)
+                return QtGui.QColor(int(r), int(g), int(b), int(a))
             else:
                 return (r,g,b,a)
         elif self.colorMode == 'hsv':
@@ -751,6 +768,18 @@ class GradientEditorItem(TickSliderItem):
             self.addTick(t[0], c, finish=False)
         self.updateGradient()
         self.sigGradientChangeFinished.emit(self)
+        
+    def setColorMap(self, cm):
+        self.setColorMode('rgb')
+        for t in list(self.ticks.keys()):
+            self.removeTick(t, finish=False)
+        colors = cm.getColors(mode='qcolor')
+        for i in range(len(cm.pos)):
+            x = cm.pos[i]
+            c = colors[i]
+            self.addTick(x, c, finish=False)
+        self.updateGradient()
+        self.sigGradientChangeFinished.emit(self)
 
         
 class Tick(GraphicsObject):

graphicsItems/GraphicsItem.py

@@ -20,7 +20,7 @@ class FiniteCache(OrderedDict):
             del self[list(self.keys())[0]]
         
     def __getitem__(self, item):
-        val = dict.__getitem__(self, item)
+        val = OrderedDict.__getitem__(self, item)
         del self[item]
         self[item] = val  ## promote this key        
         return val
@@ -194,6 +194,10 @@ class GraphicsItem(object):
         dt = self.deviceTransform()
         if dt is None:
             return None, None
+            
+        ## Ignore translation. If the translation is much larger than the scale
+        ## (such as when looking at unix timestamps), we can get floating-point errors.
+        dt.setMatrix(dt.m11(), dt.m12(), 0, dt.m21(), dt.m22(), 0, 0, 0, 1)
         
         ## check local cache
         if direction is None and dt == self._pixelVectorCache[0]:
@@ -213,15 +217,32 @@ class GraphicsItem(object):
             raise Exception("Cannot compute pixel length for 0-length vector.")
             
         ## attempt to re-scale direction vector to fit within the precision of the coordinate system
-        if direction.x() == 0:
+        ## Here's the problem: we need to map the vector 'direction' from the item to the device, via transform 'dt'.
-            r = abs(dt.m32())/(abs(dt.m12()) + abs(dt.m22()))
+        ## In some extreme cases, this mapping can fail unless the length of 'direction' is cleverly chosen.
-            #r = 1.0/(abs(dt.m12()) + abs(dt.m22()))
+        ## Example:
-        elif direction.y() == 0:
+        ##   dt = [ 1, 0,    2 
-            r = abs(dt.m31())/(abs(dt.m11()) + abs(dt.m21()))
+        ##          0, 2, 1e20
-            #r = 1.0/(abs(dt.m11()) + abs(dt.m21()))
+        ##          0, 0,    1 ]
-        else:
+        ## Then we map the origin (0,0) and direction (0,1) and get:
-            r = ((abs(dt.m32())/(abs(dt.m12()) + abs(dt.m22()))) * (abs(dt.m31())/(abs(dt.m11()) + abs(dt.m21()))))**0.5
+        ##    o' = 2,1e20
-        directionr = direction * r
+        ##    d' = 2,1e20  <-- should be 1e20+2, but this can't be represented with a 32-bit float
+        ##    
+        ##    |o' - d'|  == 0    <-- this is the problem.
+        
+        ## Perhaps the easiest solution is to exclude the transformation column from dt. Does this cause any other problems?
+        
+        #if direction.x() == 0:
+            #r = abs(dt.m32())/(abs(dt.m12()) + abs(dt.m22()))
+            ##r = 1.0/(abs(dt.m12()) + abs(dt.m22()))
+        #elif direction.y() == 0:
+            #r = abs(dt.m31())/(abs(dt.m11()) + abs(dt.m21()))
+            ##r = 1.0/(abs(dt.m11()) + abs(dt.m21()))
+        #else:
+            #r = ((abs(dt.m32())/(abs(dt.m12()) + abs(dt.m22()))) * (abs(dt.m31())/(abs(dt.m11()) + abs(dt.m21()))))**0.5
+        #if r == 0:
+            #r = 1.  ## shouldn't need to do this; probably means the math above is wrong?
+        #directionr = direction * r
+        directionr = direction
         
         ## map direction vector onto device
         #viewDir = Point(dt.map(directionr) - dt.map(Point(0,0)))

graphicsItems/PlotDataItem.py

@@ -104,6 +104,7 @@ class PlotDataItem(GraphicsObject):
         self.yData = None
         self.xDisp = None
         self.yDisp = None
+        self.dataMask = None
         #self.curves = []
         #self.scatters = []
         self.curve = PlotCurveItem()
@@ -393,6 +394,7 @@ class PlotDataItem(GraphicsObject):
                 scatterArgs[v] = self.opts[k]
         
         x,y = self.getData()
+        scatterArgs['mask'] = self.dataMask
         
         if curveArgs['pen'] is not None or (curveArgs['brush'] is not None and curveArgs['fillLevel'] is not None):
             self.curve.setData(x=x, y=y, **curveArgs)
@@ -413,11 +415,15 @@ class PlotDataItem(GraphicsObject):
         if self.xDisp is None:
             nanMask = np.isnan(self.xData) | np.isnan(self.yData) | np.isinf(self.xData) | np.isinf(self.yData)
             if any(nanMask):
-                x = self.xData[~nanMask]
+                self.dataMask = ~nanMask
-                y = self.yData[~nanMask]
+                x = self.xData[self.dataMask]
+                y = self.yData[self.dataMask]
             else:
+                self.dataMask = None
                 x = self.xData
                 y = self.yData
+                
+            
             ds = self.opts['downsample']
             if ds > 1:
                 x = x[::ds]
@@ -435,8 +441,11 @@ class PlotDataItem(GraphicsObject):
             if any(self.opts['logMode']):  ## re-check for NANs after log
                 nanMask = np.isinf(x) | np.isinf(y) | np.isnan(x) | np.isnan(y)
                 if any(nanMask):
-                    x = x[~nanMask]
+                    self.dataMask = ~nanMask
-                    y = y[~nanMask]
+                    x = x[self.dataMask]
+                    y = y[self.dataMask]
+                else:
+                    self.dataMask = None
             self.xDisp = x
             self.yDisp = y
         #print self.yDisp.shape, self.yDisp.min(), self.yDisp.max()

graphicsItems/PlotItem/PlotItem.py

@@ -36,6 +36,7 @@ from .. LabelItem import LabelItem
 from .. LegendItem import LegendItem
 from .. GraphicsWidget import GraphicsWidget
 from .. ButtonItem import ButtonItem
+from .. InfiniteLine import InfiniteLine
 from pyqtgraph.WidgetGroup import WidgetGroup
 
 __all__ = ['PlotItem']
@@ -548,10 +549,35 @@ class PlotItem(GraphicsWidget):
         print("PlotItem.addDataItem is deprecated. Use addItem instead.")
         self.addItem(item, *args)
         
+    def listDataItems(self):
+        """Return a list of all data items (PlotDataItem, PlotCurveItem, ScatterPlotItem, etc)
+        contained in this PlotItem."""
+        return self.dataItems[:]
+        
     def addCurve(self, c, params=None):
         print("PlotItem.addCurve is deprecated. Use addItem instead.")
         self.addItem(c, params)
 
+    def addLine(self, x=None, y=None, z=None, **kwds):
+        """
+        Create an InfiniteLine and add to the plot. 
+        
+        If *x* is specified,
+        the line will be vertical. If *y* is specified, the line will be
+        horizontal. All extra keyword arguments are passed to
+        :func:`InfiniteLine.__init__() <pyqtgraph.InfiniteLine.__init__>`.
+        Returns the item created.
+        """
+        angle = 0 if x is None else 90
+        pos = x if x is not None else y
+        line = InfiniteLine(pos, angle, **kwds)
+        self.addItem(line)
+        if z is not None:
+            line.setZValue(z)
+        return line
+        
+        
+
     def removeItem(self, item):
         """
         Remove an item from the internal ViewBox.

graphicsItems/ScatterPlotItem.py

@@ -384,7 +384,7 @@ class ScatterPlotItem(GraphicsObject):
         for k in ['pen', 'brush', 'symbol', 'size']:
             if k in kargs:
                 setMethod = getattr(self, 'set' + k[0].upper() + k[1:])
-                setMethod(kargs[k], update=False, dataSet=newData)
+                setMethod(kargs[k], update=False, dataSet=newData, mask=kargs.get('mask', None))
         
         if 'data' in kargs:
             self.setPointData(kargs['data'], dataSet=newData)
@@ -425,6 +425,8 @@ class ScatterPlotItem(GraphicsObject):
         
         if len(args) == 1 and (isinstance(args[0], np.ndarray) or isinstance(args[0], list)):
             pens = args[0]
+            if kargs['mask'] is not None:
+                pens = pens[kargs['mask']]
             if len(pens) != len(dataSet):
                 raise Exception("Number of pens does not match number of points (%d != %d)" % (len(pens), len(dataSet)))
             dataSet['pen'] = pens
@@ -445,6 +447,8 @@ class ScatterPlotItem(GraphicsObject):
             
         if len(args) == 1 and (isinstance(args[0], np.ndarray) or isinstance(args[0], list)):
             brushes = args[0]
+            if kargs['mask'] is not None:
+                brushes = brushes[kargs['mask']]
             if len(brushes) != len(dataSet):
                 raise Exception("Number of brushes does not match number of points (%d != %d)" % (len(brushes), len(dataSet)))
             #for i in xrange(len(brushes)):
@@ -458,7 +462,7 @@ class ScatterPlotItem(GraphicsObject):
         if update:
             self.updateSpots(dataSet)
 
-    def setSymbol(self, symbol, update=True, dataSet=None):
+    def setSymbol(self, symbol, update=True, dataSet=None, mask=None):
         """Set the symbol(s) used to draw each spot. 
         If a list or array is provided, then the symbol for each spot will be set separately.
         Otherwise, the argument will be used as the default symbol for 
@@ -468,6 +472,8 @@ class ScatterPlotItem(GraphicsObject):
             
         if isinstance(symbol, np.ndarray) or isinstance(symbol, list):
             symbols = symbol
+            if kargs['mask'] is not None:
+                symbols = symbols[kargs['mask']]
             if len(symbols) != len(dataSet):
                 raise Exception("Number of symbols does not match number of points (%d != %d)" % (len(symbols), len(dataSet)))
             dataSet['symbol'] = symbols
@@ -479,7 +485,7 @@ class ScatterPlotItem(GraphicsObject):
         if update:
             self.updateSpots(dataSet)
     
-    def setSize(self, size, update=True, dataSet=None):
+    def setSize(self, size, update=True, dataSet=None, mask=None):
         """Set the size(s) used to draw each spot. 
         If a list or array is provided, then the size for each spot will be set separately.
         Otherwise, the argument will be used as the default size for 
@@ -489,6 +495,8 @@ class ScatterPlotItem(GraphicsObject):
             
         if isinstance(size, np.ndarray) or isinstance(size, list):
             sizes = size
+            if kargs['mask'] is not None:
+                sizes = sizes[kargs['mask']]
             if len(sizes) != len(dataSet):
                 raise Exception("Number of sizes does not match number of points (%d != %d)" % (len(sizes), len(dataSet)))
             dataSet['size'] = sizes
@@ -505,6 +513,8 @@ class ScatterPlotItem(GraphicsObject):
             dataSet = self.data
             
         if isinstance(data, np.ndarray) or isinstance(data, list):
+            if kargs['mask'] is not None:
+                data = data[kargs['mask']]
             if len(data) != len(dataSet):
                 raise Exception("Length of meta data does not match number of points (%d != %d)" % (len(data), len(dataSet)))
         
@@ -881,7 +891,7 @@ class SpotItem(object):
 
     def updateItem(self):
         self._data['fragCoords'] = None
-        self._plot.updateSpots([self._data])
+        self._plot.updateSpots(self._data.reshape(1))
         self._plot.invalidate()
 
 #class PixmapSpotItem(SpotItem, QtGui.QGraphicsPixmapItem):

graphicsItems/ViewBox/ViewBox.py

@@ -576,9 +576,12 @@ class ViewBox(GraphicsWidget):
                         w2 = (targetRect[ax][1]-targetRect[ax][0]) / 2.
                         childRange[ax] = [x-w2, x+w2]
                     else:
-                        wp = (xr[1] - xr[0]) * 0.02
+                        l = self.width() if ax==0 else self.height()
-                        childRange[ax][0] -= wp
+                        if l > 0:
-                        childRange[ax][1] += wp
+                            padding = np.clip(1./(l**0.5), 0.02, 0.1)
+                            wp = (xr[1] - xr[0]) * padding
+                            childRange[ax][0] -= wp
+                            childRange[ax][1] += wp
                     targetRect[ax] = childRange[ax]
                     args['xRange' if ax == 0 else 'yRange'] = targetRect[ax]
             if len(args) == 0:

parametertree/Parameter.py

@@ -525,8 +525,9 @@ class Parameter(QtCore.QObject):
             self.removeChild(ch)
 
     def children(self):  
-        """Return a list of this parameter's children."""
+        """Return a list of this parameter's children.
-        ## warning -- this overrides QObject.children
+        Warning: this overrides QObject.children
+        """
         return self.childs[:]
     
     def hasChildren(self):
@@ -608,13 +609,13 @@ class Parameter(QtCore.QObject):
     def __getattr__(self, attr):
         ## Leaving this undocumented because I might like to remove it in the future..
         #print type(self), attr
-        import traceback
-        traceback.print_stack()
-        print "Warning: Use of Parameter.subParam is deprecated. Use Parameter.param(name) instead."
         
         if 'names' not in self.__dict__:
             raise AttributeError(attr)
         if attr in self.names:
+            import traceback
+            traceback.print_stack()
+            print "Warning: Use of Parameter.subParam is deprecated. Use Parameter.param(name) instead."
             return self.param(attr)
         else:
             raise AttributeError(attr)

parametertree/parameterTypes.py

@@ -4,6 +4,7 @@ from .Parameter import Parameter, registerParameterType
 from .ParameterItem import ParameterItem
 from pyqtgraph.widgets.SpinBox import SpinBox
 from pyqtgraph.widgets.ColorButton import ColorButton
+#from pyqtgraph.widgets.GradientWidget import GradientWidget ## creates import loop
 import pyqtgraph as pg
 import pyqtgraph.pixmaps as pixmaps
 import os
@@ -61,7 +62,11 @@ class WidgetParameterItem(ParameterItem):
             w.sigChanging.connect(self.widgetValueChanging)
             
         ## update value shown in widget. 
-        self.valueChanged(self, opts['value'], force=True)
+        if opts.get('value', None) is not None:
+            self.valueChanged(self, opts['value'], force=True)
+        else:
+            ## no starting value was given; use whatever the widget has
+            self.widgetValueChanged()
 
 
     def makeWidget(self):
@@ -125,6 +130,14 @@ class WidgetParameterItem(ParameterItem):
             w.setValue = w.setColor
             self.hideWidget = False
             w.setFlat(True)
+        elif t == 'colormap':
+            from pyqtgraph.widgets.GradientWidget import GradientWidget ## need this here to avoid import loop
+            w = GradientWidget(orientation='bottom')
+            w.sigChanged = w.sigGradientChangeFinished
+            w.sigChanging = w.sigGradientChanged
+            w.value = w.colorMap
+            w.setValue = w.setColorMap
+            self.hideWidget = False
         else:
             raise Exception("Unknown type '%s'" % asUnicode(t))
         return w
@@ -294,6 +307,7 @@ registerParameterType('float', SimpleParameter, override=True)
 registerParameterType('bool', SimpleParameter, override=True)
 registerParameterType('str', SimpleParameter, override=True)
 registerParameterType('color', SimpleParameter, override=True)
+registerParameterType('colormap', SimpleParameter, override=True)
 
 
 

rebuildUi.py

@@ -13,11 +13,11 @@ for path, sd, files in os.walk('.'):
         ui = os.path.join(path, f)
 
         py = os.path.join(path, base + '_pyqt.py')
-        if os.stat(ui).st_mtime > os.stat(py).st_mtime:
+        if not os.path.exists(py) or os.stat(ui).st_mtime > os.stat(py).st_mtime:
             os.system('%s %s > %s' % (pyqtuic, ui, py))
        	    print(py)
 
         py = os.path.join(path, base + '_pyside.py')
-        if os.stat(ui).st_mtime > os.stat(py).st_mtime:
+        if not os.path.exists(py) or os.stat(ui).st_mtime > os.stat(py).st_mtime:
             os.system('%s %s > %s' % (pysideuic, ui, py))
             print(py)

widgets/ColorButton.py

@@ -77,8 +77,14 @@ class ColorButton(QtGui.QPushButton):
     def restoreState(self, state):
         self.setColor(state)
         
-    def color(self):
+    def color(self, mode='qcolor'):
-        return functions.mkColor(self._color)
+        color = functions.mkColor(self._color)
+        if mode == 'qcolor':
+            return color
+        elif mode == 'byte':
+            return (color.red(), color.green(), color.blue(), color.alpha())
+        elif mode == 'float':
+            return (color.red()/255., color.green()/255., color.blue()/255., color.alpha()/255.)
 
     def widgetGroupInterface(self):
         return (self.sigColorChanged, ColorButton.saveState, ColorButton.restoreState)

widgets/ColorMapWidget.py

@@ -0,0 +1,173 @@
+from pyqtgraph.Qt import QtGui, QtCore
+import pyqtgraph.parametertree as ptree
+import numpy as np
+from pyqtgraph.pgcollections import OrderedDict
+import pyqtgraph.functions as fn
+
+__all__ = ['ColorMapWidget']
+
+class ColorMapWidget(ptree.ParameterTree):
+    """
+    This class provides a widget allowing the user to customize color mapping
+    for multi-column data. 
+    """
+    
+    sigColorMapChanged = QtCore.Signal(object)
+    
+    def __init__(self):
+        ptree.ParameterTree.__init__(self, showHeader=False)
+        
+        self.params = ColorMapParameter()
+        self.setParameters(self.params)
+        self.params.sigTreeStateChanged.connect(self.mapChanged)
+        
+        ## wrap a couple methods 
+        self.setFields = self.params.setFields
+        self.map = self.params.map
+
+    def mapChanged(self):
+        self.sigColorMapChanged.emit(self)
+        
+
+class ColorMapParameter(ptree.types.GroupParameter):
+    sigColorMapChanged = QtCore.Signal(object)
+    
+    def __init__(self):
+        self.fields = {}
+        ptree.types.GroupParameter.__init__(self, name='Color Map', addText='Add Mapping..', addList=[])
+        self.sigTreeStateChanged.connect(self.mapChanged)
+        
+    def mapChanged(self):
+        self.sigColorMapChanged.emit(self)
+        
+    def addNew(self, name):
+        mode = self.fields[name].get('mode', 'range')
+        if mode == 'range':
+            self.addChild(RangeColorMapItem(name, self.fields[name]))
+        elif mode == 'enum':
+            self.addChild(EnumColorMapItem(name, self.fields[name]))
+        
+    def fieldNames(self):
+        return self.fields.keys()
+    
+    def setFields(self, fields):
+        self.fields = OrderedDict(fields)
+        #self.fields = fields
+        #self.fields.sort()
+        names = self.fieldNames()
+        self.setAddList(names)
+        
+    def map(self, data, mode='byte'):
+        colors = np.zeros((len(data),4))
+        for item in self.children():
+            if not item['Enabled']:
+                continue
+            chans = item.param('Channels..')
+            mask = np.empty((len(data), 4), dtype=bool)
+            for i,f in enumerate(['Red', 'Green', 'Blue', 'Alpha']):
+                mask[:,i] = chans[f]
+            
+            colors2 = item.map(data)
+            
+            op = item['Operation']
+            if op == 'Add':
+                colors[mask] = colors[mask] + colors2[mask]
+            elif op == 'Multiply':
+                colors[mask] *= colors2[mask]
+            elif op == 'Overlay':
+                a = colors2[:,3:4]
+                c3 = colors * (1-a) + colors2 * a
+                c3[:,3:4] = colors[:,3:4] + (1-colors[:,3:4]) * a
+                colors = c3
+            elif op == 'Set':
+                colors[mask] = colors2[mask]
+            
+                
+        colors = np.clip(colors, 0, 1)
+        if mode == 'byte':
+            colors = (colors * 255).astype(np.ubyte)
+        
+        return colors
+            
+    
+class RangeColorMapItem(ptree.types.SimpleParameter):
+    def __init__(self, name, opts):
+        self.fieldName = name
+        units = opts.get('units', '')
+        ptree.types.SimpleParameter.__init__(self, 
+            name=name, autoIncrementName=True, type='colormap', removable=True, renamable=True, 
+            children=[
+                #dict(name="Field", type='list', value=name, values=fields),
+                dict(name='Min', type='float', value=0.0, suffix=units, siPrefix=True),
+                dict(name='Max', type='float', value=1.0, suffix=units, siPrefix=True),
+                dict(name='Operation', type='list', value='Overlay', values=['Overlay', 'Add', 'Multiply', 'Set']),
+                dict(name='Channels..', type='group', expanded=False, children=[
+                    dict(name='Red', type='bool', value=True),
+                    dict(name='Green', type='bool', value=True),
+                    dict(name='Blue', type='bool', value=True),
+                    dict(name='Alpha', type='bool', value=True),
+                    ]),
+                dict(name='Enabled', type='bool', value=True),
+                dict(name='NaN', type='color'),
+            ])
+    
+    def map(self, data):
+        data = data[self.fieldName]
+        
+        
+        
+        scaled = np.clip((data-self['Min']) / (self['Max']-self['Min']), 0, 1)
+        cmap = self.value()
+        colors = cmap.map(scaled, mode='float')
+        
+        mask = np.isnan(data) | np.isinf(data)
+        nanColor = self['NaN']
+        nanColor = (nanColor.red()/255., nanColor.green()/255., nanColor.blue()/255., nanColor.alpha()/255.)
+        colors[mask] = nanColor
+        
+        return colors
+
+
+class EnumColorMapItem(ptree.types.GroupParameter):
+    def __init__(self, name, opts):
+        self.fieldName = name
+        vals = opts.get('values', [])
+        childs = [{'name': v, 'type': 'color'} for v in vals]
+        ptree.types.GroupParameter.__init__(self, 
+            name=name, autoIncrementName=True, removable=True, renamable=True, 
+            children=[
+                dict(name='Values', type='group', children=childs),
+                dict(name='Operation', type='list', value='Overlay', values=['Overlay', 'Add', 'Multiply', 'Set']),
+                dict(name='Channels..', type='group', expanded=False, children=[
+                    dict(name='Red', type='bool', value=True),
+                    dict(name='Green', type='bool', value=True),
+                    dict(name='Blue', type='bool', value=True),
+                    dict(name='Alpha', type='bool', value=True),
+                    ]),
+                dict(name='Enabled', type='bool', value=True),
+                dict(name='Default', type='color'),
+            ])
+    
+    def map(self, data):
+        data = data[self.fieldName]
+        colors = np.empty((len(data), 4))
+        default = np.array(fn.colorTuple(self['Default'])) / 255.
+        colors[:] = default
+        
+        for v in self.param('Values'):
+            n = v.name()
+            mask = data == n
+            c = np.array(fn.colorTuple(v.value())) / 255.
+            colors[mask] = c
+        #scaled = np.clip((data-self['Min']) / (self['Max']-self['Min']), 0, 1)
+        #cmap = self.value()
+        #colors = cmap.map(scaled, mode='float')
+        
+        #mask = np.isnan(data) | np.isinf(data)
+        #nanColor = self['NaN']
+        #nanColor = (nanColor.red()/255., nanColor.green()/255., nanColor.blue()/255., nanColor.alpha()/255.)
+        #colors[mask] = nanColor
+        
+        return colors
+
+

widgets/DataFilterWidget.py

@@ -0,0 +1,115 @@
+from pyqtgraph.Qt import QtGui, QtCore
+import pyqtgraph.parametertree as ptree
+import numpy as np
+from pyqtgraph.pgcollections import OrderedDict
+
+__all__ = ['DataFilterWidget']
+
+class DataFilterWidget(ptree.ParameterTree):
+    """
+    This class allows the user to filter multi-column data sets by specifying
+    multiple criteria
+    """
+    
+    sigFilterChanged = QtCore.Signal(object)
+    
+    def __init__(self):
+        ptree.ParameterTree.__init__(self, showHeader=False)
+        self.params = DataFilterParameter()
+        
+        self.setParameters(self.params)
+        self.params.sigTreeStateChanged.connect(self.filterChanged)
+        
+        self.setFields = self.params.setFields
+        self.filterData = self.params.filterData
+        
+    def filterChanged(self):
+        self.sigFilterChanged.emit(self)
+        
+    def parameters(self):
+        return self.params
+        
+        
+class DataFilterParameter(ptree.types.GroupParameter):
+    
+    sigFilterChanged = QtCore.Signal(object)
+    
+    def __init__(self):
+        self.fields = {}
+        ptree.types.GroupParameter.__init__(self, name='Data Filter', addText='Add filter..', addList=[])
+        self.sigTreeStateChanged.connect(self.filterChanged)
+    
+    def filterChanged(self):
+        self.sigFilterChanged.emit(self)
+        
+    def addNew(self, name):
+        mode = self.fields[name].get('mode', 'range')
+        if mode == 'range':
+            self.addChild(RangeFilterItem(name, self.fields[name]))
+        elif mode == 'enum':
+            self.addChild(EnumFilterItem(name, self.fields[name]))
+            
+            
+    def fieldNames(self):
+        return self.fields.keys()
+    
+    def setFields(self, fields):
+        self.fields = OrderedDict(fields)
+        names = self.fieldNames()
+        self.setAddList(names)
+    
+    def filterData(self, data):
+        if len(data) == 0:
+            return data
+        return data[self.generateMask(data)]
+    
+    def generateMask(self, data):
+        mask = np.ones(len(data), dtype=bool)
+        if len(data) == 0:
+            return mask
+        for fp in self:
+            if fp.value() is False:
+                continue
+            mask &= fp.generateMask(data)
+            #key, mn, mx = fp.fieldName, fp['Min'], fp['Max']
+            
+            #vals = data[key]
+            #mask &= (vals >= mn)
+            #mask &= (vals < mx)  ## Use inclusive minimum and non-inclusive maximum. This makes it easier to create non-overlapping selections
+        return mask
+
+class RangeFilterItem(ptree.types.SimpleParameter):
+    def __init__(self, name, opts):
+        self.fieldName = name
+        units = opts.get('units', '')
+        ptree.types.SimpleParameter.__init__(self, 
+            name=name, autoIncrementName=True, type='bool', value=True, removable=True, renamable=True, 
+            children=[
+                #dict(name="Field", type='list', value=name, values=fields),
+                dict(name='Min', type='float', value=0.0, suffix=units, siPrefix=True),
+                dict(name='Max', type='float', value=1.0, suffix=units, siPrefix=True),
+            ])
+            
+    def generateMask(self, data):
+        vals = data[self.fieldName]
+        return (vals >= mn) & (vals < mx)  ## Use inclusive minimum and non-inclusive maximum. This makes it easier to create non-overlapping selections
+    
+    
+class EnumFilterItem(ptree.types.SimpleParameter):
+    def __init__(self, name, opts):
+        self.fieldName = name
+        vals = opts.get('values', [])
+        childs = [{'name': v, 'type': 'bool', 'value': True} for v in vals]
+        ptree.types.SimpleParameter.__init__(self, 
+            name=name, autoIncrementName=True, type='bool', value=True, removable=True, renamable=True, 
+            children=childs)
+    
+    def generateMask(self, data):
+        vals = data[self.fieldName]
+        mask = np.ones(len(data), dtype=bool)
+        for c in self:
+            if c.value() is True:
+                continue
+            key = c.name()
+            mask &= vals != key
+        return mask

widgets/ScatterPlotWidget.py

@@ -0,0 +1,183 @@
+from pyqtgraph.Qt import QtGui, QtCore
+from .PlotWidget import PlotWidget
+from .DataFilterWidget import DataFilterParameter
+from .ColorMapWidget import ColorMapParameter
+import pyqtgraph.parametertree as ptree
+import pyqtgraph.functions as fn
+import numpy as np
+from pyqtgraph.pgcollections import OrderedDict
+
+__all__ = ['ScatterPlotWidget']
+
+class ScatterPlotWidget(QtGui.QSplitter):
+    """
+    Given a record array, display a scatter plot of a specific set of data.
+    This widget includes controls for selecting the columns to plot,
+    filtering data, and determining symbol color and shape. This widget allows
+    the user to explore relationships between columns in a record array.
+    
+    The widget consists of four components:
+    
+    1) A list of column names from which the user may select 1 or 2 columns
+       to plot. If one column is selected, the data for that column will be
+       plotted in a histogram-like manner by using :func:`pseudoScatter()
+       <pyqtgraph.pseudoScatter>`. If two columns are selected, then the
+       scatter plot will be generated with x determined by the first column
+       that was selected and y by the second.
+    2) A DataFilter that allows the user to select a subset of the data by 
+       specifying multiple selection criteria.
+    3) A ColorMap that allows the user to determine how points are colored by
+       specifying multiple criteria.
+    4) A PlotWidget for displaying the data.
+    """
+    def __init__(self, parent=None):
+        QtGui.QSplitter.__init__(self, QtCore.Qt.Horizontal)
+        self.ctrlPanel = QtGui.QSplitter(QtCore.Qt.Vertical)
+        self.addWidget(self.ctrlPanel)
+        self.fieldList = QtGui.QListWidget()
+        self.fieldList.setSelectionMode(self.fieldList.ExtendedSelection)
+        self.ptree = ptree.ParameterTree(showHeader=False)
+        self.filter = DataFilterParameter()
+        self.colorMap = ColorMapParameter()
+        self.params = ptree.Parameter.create(name='params', type='group', children=[self.filter, self.colorMap])
+        self.ptree.setParameters(self.params, showTop=False)
+        
+        self.plot = PlotWidget()
+        self.ctrlPanel.addWidget(self.fieldList)
+        self.ctrlPanel.addWidget(self.ptree)
+        self.addWidget(self.plot)
+        
+        self.data = None
+        self.style = dict(pen=None, symbol='o')
+        
+        self.fieldList.itemSelectionChanged.connect(self.fieldSelectionChanged)
+        self.filter.sigFilterChanged.connect(self.filterChanged)
+        self.colorMap.sigColorMapChanged.connect(self.updatePlot)
+    
+    def setFields(self, fields):
+        """
+        Set the list of field names/units to be processed.
+        Format is: [(name, units), ...]   
+        """
+        self.fields = OrderedDict(fields)
+        self.fieldList.clear()
+        for f,opts in fields:
+            item = QtGui.QListWidgetItem(f)
+            item.opts = opts
+            item = self.fieldList.addItem(item)
+        self.filter.setFields(fields)
+        self.colorMap.setFields(fields)
+        
+    def setData(self, data):
+        """
+        Set the data to be processed and displayed. 
+        Argument must be a numpy record array.
+        """
+        self.data = data
+        self.filtered = None
+        self.updatePlot()
+        
+    def fieldSelectionChanged(self):
+        sel = self.fieldList.selectedItems()
+        if len(sel) > 2:
+            self.fieldList.blockSignals(True)
+            try:
+                for item in sel[1:-1]:
+                    item.setSelected(False)
+            finally:
+                self.fieldList.blockSignals(False)
+                
+        self.updatePlot()
+        
+    def filterChanged(self, f):
+        self.filtered = None
+        self.updatePlot()
+        
+    def updatePlot(self):
+        self.plot.clear()
+        if self.data is None:
+            return
+        
+        if self.filtered is None:
+            self.filtered = self.filter.filterData(self.data)
+        data = self.filtered
+        if len(data) == 0:
+            return
+        
+        colors = np.array([fn.mkBrush(*x) for x in self.colorMap.map(data)])
+        
+        style = self.style.copy()
+        
+        ## Look up selected columns and units
+        sel = list([str(item.text()) for item in self.fieldList.selectedItems()])
+        units = list([item.opts.get('units', '') for item in self.fieldList.selectedItems()])
+        if len(sel) == 0:
+            self.plot.setTitle('')
+            return
+        
+
+        if len(sel) == 1:
+            self.plot.setLabels(left=('N', ''), bottom=(sel[0], units[0]), title='')
+            if len(data) == 0:
+                return
+            x = data[sel[0]]
+            #if x.dtype.kind == 'f':
+                #mask = ~np.isnan(x)
+            #else:
+                #mask = np.ones(len(x), dtype=bool)
+            #x = x[mask]
+            #style['symbolBrush'] = colors[mask]
+            y = None
+        elif len(sel) == 2:
+            self.plot.setLabels(left=(sel[1],units[1]), bottom=(sel[0],units[0]))
+            if len(data) == 0:
+                return
+            
+            xydata = []
+            for ax in [0,1]:
+                d = data[sel[ax]]
+                ## scatter catecorical values just a bit so they show up better in the scatter plot.
+                #if sel[ax] in ['MorphologyBSMean', 'MorphologyTDMean', 'FIType']:
+                    #d += np.random.normal(size=len(cells), scale=0.1)
+                xydata.append(d)
+            x,y = xydata
+            #mask = np.ones(len(x), dtype=bool)
+            #if x.dtype.kind == 'f':
+                #mask |= ~np.isnan(x)
+            #if y.dtype.kind == 'f':
+                #mask |= ~np.isnan(y)
+            #x = x[mask]
+            #y = y[mask]
+            #style['symbolBrush'] = colors[mask]
+
+        ## convert enum-type fields to float, set axis labels
+        xy = [x,y]
+        for i in [0,1]:
+            axis = self.plot.getAxis(['bottom', 'left'][i])
+            if xy[i] is not None and xy[i].dtype.kind in ('S', 'O'):
+                vals = self.fields[sel[i]].get('values', list(set(xy[i])))
+                xy[i] = np.array([vals.index(x) if x in vals else None for x in xy[i]], dtype=float)
+                axis.setTicks([list(enumerate(vals))])
+            else:
+                axis.setTicks(None)  # reset to automatic ticking
+        x,y = xy
+        
+        ## mask out any nan values
+        mask = np.ones(len(x), dtype=bool)
+        if x.dtype.kind == 'f':
+            mask &= ~np.isnan(x)
+        if y is not None and y.dtype.kind == 'f':
+            mask &= ~np.isnan(y)
+        x = x[mask]
+        style['symbolBrush'] = colors[mask]
+
+        ## Scatter y-values for a histogram-like appearance
+        if y is None:
+            y = fn.pseudoScatter(x)
+        else:
+            y = y[mask]
+                
+            
+        self.plot.plot(x, y, **style)
+        
+